کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4693455 | 1636864 | 2010 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Palaeogeographic implications of differential inclination shallowing in permo-carboniferous sediments from the donets basin, Ukraine
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present new palaeomagnetic data from Upper Carboniferous and Lower Permian grey and red sediments from the Donets Basin, Ukraine, part of the Palaeozoic East European Platform. Detailed demagnetization of these units reveals two ancient components of magnetization: component “B”, which is carried by magnetite and pigmentary haematite, and a high unblocking temperature component “C”, present only in the red beds, carried by detrital haematite. The “B” and “C” components both pass fold tests indicating a primary or a near primary-origin for magnetizations. The “C” component, however, yields palaeolatiudes that are consistently lower (by up to â¼Â 12° of latitude or â¼Â 1330 km) than those derived from the “B” component, and we argue that this is due to significant inclination-shallowing of the “C”-component. A comparison with European reference palaeomagnetic data reveals that the reference data also span a large spread of palaeolatitudes for this time, and we argue that unrecognized shallowing may have crept into the reference data when based on sedimentary units. A more rigorous approach to selecting reference palaeomagnetic data may well be key to resolving palaeogeographic controversies at this time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 490, Issues 3â4, 30 July 2010, Pages 229-240
Journal: Tectonophysics - Volume 490, Issues 3â4, 30 July 2010, Pages 229-240
نویسندگان
Alexandr G. Iosifidi, Conall Mac Niocaill, Alexei N. Khramov, Mark J. Dekkers, Viktor V. Popov,